A plank `P` is placed on a solid cylinder `S`, which rolls on a horizontal surface. The two are of equal mass. There is no slipping at any of the surfaces in contact. The ratio of kinetic energy of `P` to the kinetic energy of `S` is:

Options

A. `1:1`
B. `12:1`
C. `8:3`
D. `11:8`

Answer

C

Explanation

`KE_(P)=(1)/(2)m(2v)^(2)`
`kE_(S)=(3)/(4)mv^(2)`